.wrap {
    width: 1200px;
    margin: auto;
}

body {
    margin: 0;
    padding: 0;
    font-size: 18px;
    background-color: rgba(245, 245, 245, 1);
    font-family: PingFangSC-Medium, PingFang SC;
}

.header {
    height: 60px;
    width: 100%;
    overflow: hidden;
    padding-top: 10px;
    box-sizing: border-box;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 333;
    background-color: #fff;
}

.header img {
    width: 50px;
    height: 50px;
    margin-right: 20px;
}

.header span {
    display: inline-block;
    width: 86%;
    height: 100%;
    font-size: 19px;
    font-weight: 700;
    margin-left: 47px;
}

nav {
    position: fixed;
    top: 60px;
    left: 0;
    height: 60px;
    background-color: #0768AC;
    width: 100%;
    z-index: 444;
}


nav ul li {
    float: left;
    line-height: 60px;
    margin-right: 45px;
    color: #fff;
    font-weight: 700;
    font-size: 16px;
    cursor: pointer;
}

nav ul li a {
    color: #fff;
}

nav ul li:nth-child(1) {
    margin-left: 20px;
}

nav ul li:last-child dl {
    display: none;
    width: 100px;
}

nav ul li:nth-child(5) dl {
    display: none;
    width: 150px;
}

nav ul li:nth-child(5):hover dl {
    display: block;
}

nav ul .last:hover dl {
    display: block;
}

nav ul li dl {
    margin-top: 5px;
    background-color: #fff;
    color: #000;
    text-align: center;
    position: absolute;
    z-index: 22;
}

nav ul li dl dd {
    height: 50px;
    line-height: 50px;
    cursor: pointer;
    font-size: 14px;
}

nav ul li dl dd:hover {
    background-color: #ccc;
}

nav ul li dl dd .pp {
    color: #000;
}

.clear {
    clear: both;
}